JPH0789333A - Air conditioner for electric drive vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] The objective is to use another heat source when the heat pump heating capacity is insufficient, to enable dehumidifying and heating operation, and to have a structure that is safe for the human body. [Composition] A combustion-type water heating device arranged outside the passenger compartment for heating water by combustion and an electric water heating device arranged outside the passenger compartment for heating water by electricity are installed in a water pump and the air heat exchanger in the passenger compartment. A ventilation circuit which is arranged outside and connects the vehicle interior air outlet, a heater core arranged in the ventilation circuit, the combustion water heating device, the electric water heating device, the water pump, and the heater core are connected in series. It has a water circuit to connect it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for an electrically driven vehicle for air conditioning the interior of the electrically driven vehicle.

[0002]

2. Description of the Related Art In a conventional fuel engine air conditioner for an automobile, for example, a compressor 1 for compressing a refrigerant is driven by an engine as shown in FIG. After the heat is radiated to the air outside the vehicle compartment to condense and liquefy the refrigerant by the exchanger 2 and the outside air heat exchanger blower 3, the refrigerant is guided to the vehicle interior air heat exchanger 5 via the expansion device 4,
Here, the air in the passenger compartment air heat exchanger 6 cools and dehumidifies the air in the passenger compartment to perform the cooling operation. In addition, the heating operation was performed by a hot water heater using the engine water temperature.

In the air conditioner for an electrically driven vehicle, the cooling action is the same as the above, but the heating action cannot use the engine water temperature, so the dotted line portion in FIG.
As shown in (b), the four-way switching valve 7 is used downstream of the compressor 1 to reverse the refrigerant flow path, and the passenger compartment air heat exchanger 5 radiates heat to the passenger compartment air to condense and liquefy the refrigerant. To the outside air heat exchanger 2 via the expansion valve 3, where it is necessary to perform heat pump heating in which the refrigerant absorbs and evaporates while cooling and dehumidifying the air outside the vehicle.

Further, in an air conditioner for a fuel engine automobile,
Japanese Patent Application Laid-Open No. 3-90430 describes an example of performing air conditioning by heat pump heating using engine exhaust heat.

[0005]

[Problems to be Solved by the Invention]

(1) Heat pump When the heating capacity is insufficient, the electric drive vehicle does not have engine exhaust heat, and therefore it is a problem to use another heat source instead.

(2) It is a problem that the glass in the vehicle compartment cannot be fogged only by heat pump heating.

(3) Since it is mounted on a vehicle, it is a problem to configure each device safely with respect to the human body.

The above has been a problem in using the heat pump cooling and heating in an air conditioner for an electrically driven vehicle.

The present invention is intended to solve the above problems, and it is an object of the present invention to enable effective use of other heat sources and improvement of safety.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has a combustion-type water heating device arranged outside the vehicle compartment for heating water by combustion and an outside room for heating water by electricity. An electric water heating device is provided outside the water pump and the vehicle interior air heat exchanger, and a ventilation circuit that connects the vehicle interior air outlets, a heater core disposed in the ventilation circuit, the combustion water heating device, and the electricity A water circuit is provided in which the water heater, the water pump, and the heater core are connected in series.

In addition to the above means, an outside air temperature detecting device and a control device for controlling the combustion type water heating device and the electric heater type water heating device according to the outside air temperature are provided.

[0012]

As described above, according to the present invention, the air in the passenger compartment can be heated by the combustion type water heating device and the electric type water heating device.

In addition to the above-mentioned operation, the present invention can control the driving of the combustion type water heating apparatus and the electric type water heating apparatus at the outside air temperature.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention according to claim 1 is intended to utilize another heat source when the heat pump heating capacity is insufficient, enable dehumidifying and heating operation, and have a structure which is safe for the human body. .

FIG. 1 is a system diagram of an embodiment of the air conditioner for an electrically driven vehicle of claim 1.

In FIG. 1, a compressor 1, a vehicle exterior air heat exchanger 2, a vehicle exterior air heat exchanger blower 3, a throttle device 4, a vehicle interior air heat exchanger 5, a vehicle interior air heat exchanger blower 6 are shown. A four-way switching valve 7 and a ventilation circuit 9 which is arranged in the vehicle interior so as to surround the vehicle interior air heat exchanger 5 and introduces the air sucked by the vehicle interior air heat exchanger blower 6 to the vehicle interior outlet 8. A heater core 10 arranged in the ventilation circuit 9 for heating air with hot water, a damper 11 for controlling the amount of air introduced into the heater core, and a combustion type water heating device 12 arranged outside for heating water by combustion Hot water arranged to connect the electric water heating device 13, the water pump 14, the heater core 10, the combustion water heating device 12, the electric water heating device 13 and the water pump 14 that heat air by Circuit 15 It is arranged.

In the air conditioner for an electrically driven vehicle constructed as described above, when the heating capacity is insufficient, the damper 11 is provided as shown in FIG.
By switching to the position indicated by the solid line in the figure, the water is heated by either or both of the combustion water heating device 12 and the electric water heating device 13, and hot water is circulated through the heater core 10 by the water pump 14 to heat the air. The heating capacity can be supplemented.

Further, the dehumidifying and heating operation by reheating becomes possible by setting the refrigerant circuit side to the cooling mode.

Furthermore, by disposing the heating device outside the passenger compartment, the heating device can be safely constructed for the human body.

The present invention according to claim 2 is intended to utilize another heat source when the heat pump heating capacity is insufficient, enable dehumidifying and heating operation, and have a structure which is safe for the human body. .

FIG. 2 is a system diagram of an embodiment of the air conditioner for an electrically driven vehicle of claim 2.

In FIG. 2, a compressor 1, a vehicle exterior air heat exchanger 2, a vehicle exterior air heat exchanger blower 3, a throttle device 4, a vehicle interior air heat exchanger 5, a vehicle interior air heat exchanger blower 6 are shown. A four-way switching valve 7 and a ventilation circuit 9 which is arranged in the vehicle interior so as to surround the vehicle interior air heat exchanger 5 and introduces the air sucked by the vehicle interior air heat exchanger blower 6 to the vehicle interior outlet 8. A heater core 10 arranged in the ventilation circuit 9 for heating air with hot water, a damper 11 for controlling the amount of air introduced into the heater core, and a combustion type water heating device 12 arranged outside for heating water by combustion Hot water arranged to connect the electric water heating device 13, the water pump 14, the heater core 10, the combustion water heating device 12, the electric water heating device 13 and the water pump 14 that heat air by Circuit 15 And disposed a control device 17 for controlling the electric water heater 13 and the combustion type water heating device 12 by the outside air temperature and outside air temperature detecting device 16 for detecting the outside air temperature outside.

In the air conditioner for an electrically driven vehicle constructed as described above, when the heating capacity is insufficient, the damper 11 is provided as shown in FIG.
Switch to the position of the solid line inside, and from the electric water heating device 13 to the combustion type water heating device 12 depending on the outside temperature below a certain temperature
When the temperature drops, the heating device can be used together to drive the heating capacity in a wide range of temperature conditions. Electric air heating can be performed up to a temperature, and an electric vehicle can be configured as a pollution-free vehicle for air conditioning.

Further, by putting the refrigerant circuit side in the cooling mode, the dehumidifying and heating operation by reheating becomes possible.

Further, by disposing the heating device outside the passenger compartment, the heating device can be safely constructed for the human body.

[0027]

As is apparent from the above, according to claim 1 of the present invention, in a simple structure in which a hot water circuit is arranged in series, dehumidification in the vehicle interior due to reheating and an external arrangement provided outside the vehicle interior when the heat pump heating capacity is insufficient. A heat source can be utilized. In addition, it is safe for the human body because the external heat source is placed outside the vehicle.

Further, in addition to the above effects, since the selection of the heat source can be controlled by the outside temperature, electric air heating can be performed until the outside air temperature reaches a constant temperature, and the air conditioner can be configured as an pollution-free electric vehicle.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of an air conditioner for an electrically driven vehicle according to claim 1 of the present invention.

FIG. 2 is a configuration diagram of an embodiment of an air conditioner for an electrically driven vehicle according to claim 2 of the present invention.

FIG. 3A is a configuration diagram of a conventional air conditioner for cooling an engine driven by a fuel engine, and FIG. 3B is a configuration diagram of an air conditioner for an electrically driven vehicle according to a conventional example.

[Explanation of symbols]

 1 Compressor 2 Outside air heat exchanger for vehicle 3 Air blower for outside air heat exchanger for vehicle 4 Throttle device 5 Air heat exchanger for vehicle interior 6 Air blower for air heat exchanger for vehicle interior 7 Four-way switching valve 8 Air outlet for vehicle interior 9 Ventilation circuit 10 Heater core 11 Damper 12 Combustion type water heating device 13 Electric water heating device 14 Water pump 15 Hot water circuit 16 Vehicle outside air temperature detection device 17 Control device

Claims (2)

[Claims] 1. A compressor, a vehicle exterior air heat exchanger, a vehicle exterior air heat exchanger blower, a throttle device for reducing the refrigerant flow rate, a vehicle interior air heat exchanger, a vehicle interior air heat exchanger blower, and a four-way switching valve. A heat pump cooling and heating device, a combustion-type water heating device arranged outside the passenger compartment for heating water by combustion, and an electric water heating device arranged outside the passenger compartment for heating water by electricity as a water pump and the A ventilation circuit which is arranged outside the vehicle interior air heat exchanger and connects the vehicle interior outlet, a heater core arranged in the ventilation circuit, the combustion type water heating device, the electric water heating device, the water pump, and the water pump. An air conditioner for an electrically driven vehicle equipped with a water circuit that connects the heater core devices in series. 2. The air conditioner for an electrically driven vehicle according to claim 1, further comprising an outside air temperature detecting device and a control device.